Bondo-Hair Long Strand Fiberglass Body Filler

Bondo-Hair is formulated with long strands of chopped fiberglass for twice the strength of a regular body filler. Recommended for use on up to 1" rust holes, shattered fiberglass and dents where extra strength is required. Great for rebuilding missing pieces or auto/marine restoration work. Repairs fiberglass, metal and wood. Sandable in only 20 minutes and compatible with all fillers, primers and paints. Waterproof. Includes red cream hardener.

2015-01-12CHRISTOPHER M JOHNSON:The Bondo Long Hair Fiberglass Filler is probably not what you want to use to fill dings and screw heads because it will not fill small areas cleanly. I used a gallon of the stuff and it did really well at filling and building up large areas but it is extremely sticky and does not separate into small globs to fill a screw head. The material is extremely "globby." when you scoop it out of the bucket to mix, it does not want to separate from the rest of the material. I think the fine bondo would do a good job for you because it does lend itself the batching in small increments and is workable to fill small holes. Hope this helps.

I have rotten wood on the sill touching my foundation and will need to jack up the house and replace in a couple years. I used Bondo-Hair as a temporary patch to seal the rotten area after treating it with a rot-killer. I needed to take small clumps of the product at a time and mix it with the hardener which took some time and became messy toward the end, but the result was a waterproof seal that is very moldable before it sets. It's waterproof, doesn't shrink, and is extremely strong. Adheres to anything.